I got a stage 1 turbo in my eclipse rs...i had some questions though...

how do u know when u cracked a piston? piston ring? like what do you see? feel? hear?

how bout when you blow your head gasket, what do you see? feel? hear?

how do you know when you should stop driving your car and that you need to rebuild your motor?

Do a compression check.

Check for leaks by your headgasket.

You losing some power or what?

Well, I have an RS with a Star Stage 1 E-trim. I was just pushing 5psi for a year non intercooled and I have a boat load of oil coming out of the breather on my valve cover. When I first had the turbo put on, I had little to no oil coming out of the breather. I have a compression tester and I havent done a test yet cause Im too lazy to do it. But I'm sure its a cracked piston. When it first started, I had to go into boost in order for oil to spray out but now I dont have to. If you are having the same issues then that most likely is the problem. Also, I have smoke coming out of the breather, oil cap and oil dip stick pipe. Ive never had smoke coming out of the tail pipe unless I put something over the breather to stop the smoke. Im currently getting a rebuild done. Good luck bro.